VIU CONTENTS 



The classification of drugs in terms of enzyme systems upon 



which they act 8g 



The mode of action of vesicants 91 



Biological aspects of enzyme studies 94 



References 96 



V. The Actions of Narcotics 



Introduction 97 



Theories of actions upon surfaces 99 



Theories based on oil-water partition effects ^05 



Theories based on actions on enzymes 109 



References 114 



VI, Responses of Cells on the Biological Level 



Introduction 119 



The nature of biological responses 119 



Artificial parthenogenesis I23 



Mitotic poisons 123 



Reproduction of bacteria and viruses 136 



Nuclear and cytoplasmic drug action 139 



Possible modes of drug action upon genes 141 



The relationship between hormones and evocators .... 146 



References I49 



Author Index 151 



Subject Index 153 



